Valve for hot-blast ovens



i (No Model.) I 2 Sheets-Sheet 1. V. 0. STROBEL. k

VALVE FOR HOT BLAST OVENS.

No. 350,568. Patented Oct. 12, 1886.

Witnesses: O Inven'tor Attorney (No Model.) 2 Sheets-Sheet 2.

V. O. STROBEL.

VALVE FOR HOT BLAST OVENS. I No. 350,568. Patented Oct. 12, 1886.

Witnesses: o. Inventor Attorney Q mm H .WSm.

UNITED STATES PATENT OFFICE,

VICTOR O. STROBEL, OF PHILADELPHIA, PENNSYLVANIA.

VA LVE FOR HOT-BLAST OVENS.

SPECIFICATION forming part of Letters PatentNo. 350,568, dated October 12, 1886.

Application filed March .29, 1886.

7 0 all whom it 71mg concern:

, Be it known that I, VIoToR O. STROBEL, of

Philadelphia, Philadelphia county, Pennsylvania, have invented certain new and useful Improvements in Valves for Hot-Blast Ovens,

of which the following is a specification.

This invention relates to chimney-Valves for hot-blast stoves, and will be readily understood from the following description, taken in connection with the accompanying drawings, in which Figure 1 is a vertical section of a regenerative hot-blast stove fitted with my improved chimney-valve at its base; Fig. 2, a plan of the valve, shown partly open, with part of the valve-bod y and its inclosing-fiue shown in horizontal section; Fig. 3, a vertical diametrical section of the flue leading to the chimney, the base portion of the stove where the flue con-' nects, and the valve placed at such point of connection; Fig. 4, a view of the valve similarto Fig. 2, except that the valve is shown as closed; and Fig. 5, a portion of the nosecap of the valve-body, with the dust-valve shown in front elevation.

In the drawings, A indicates a regenerative hot-blast stove, to be arranged in the usual manner to be heated by burning gases passing through it in one direction,and to subsequently give up its heat to an air-blast passing through it in the contrary direction; B, the gas inlet and hot-blast outlet to the stove; O, the coldblast inlet to the stove; D, a flue of brick-work leading from the gas-outlet at the base of the stove to the chimney; E, the chimney-valve inserted in the fine D, and serving to cut off the chimney-connection when the stove is under blast; F, the cylindrical sh ell of the valvebody secured to the base of the stove; G, a portion of the shell projecting below the ,valveseat downward into the flue D, Where it fits and serves to form the male element of aslip-joint; H, an annular chamber in that portion of the flue surrounding the shell above the slip-joint; J, a dust-valvenpon the outer end of the nosecap of the valve-body; K, the hand-lever by which the dustvalve isoperated; L, an opening through the side of the flue D, leading from the outer atmosphere into the chamber H, and M a port through the valve-body at a point Serial No. 197,084. (Yo model.)

opposite the opening L,1rat.ling from the chamber H into the line belowthe valve.

The .valve proper is-disposed horizontally, and is hollow,and is intended to be cooled by the passage of water or other cooling medium, 5 and the valvescat is also to be similarly arranged. The dnst settling above the valve is to be blown out through the dust-valve J, which is located upon the nose-cap of the valve which projects horizontally outward.

As the masonry of the flue D becomes moved or distorted by settling, the slip joint formed at G still maintains connection between the valvtbody and the flue, even when the flue may have pulled loose from the bottom of the stove.

Fresh air from the atmosphere enters the opening L and circulates through the chamber H, whence it is drawn into the chimney through the port M, thus serving to cool the parts in the neighborhood of the valveseat.

I have heretofore in Letters Patent shown a stove having a metallic chimney rigidly secured to the stove-shell, the inner brick-work of the stove having a nozzle projecting upward into the chimney and forming a slip-joint, the nozzle being inaccessible in case of needed repairs. My present device differs from the one described, in that the valve-body forms a metallic nozzle secured to the stoveshell, while the masonry of the flue engages the nozzle exteriorly, thus rendering access and repair convenient with reference to the brickwork of I the slip-joint, which is the part liable to disturbance.

. Valve-seats and valvrs have heretofore gen- 8 5 erally been provided with interior cooling cavities having suitable condnit-connections. I In my present device, aside from such interior cooling-cavities, I provide a cooling-chamber exterior to and surrounding the valve body, within which valve-body, if desired, may be the usual cooling-cavities, &'c., of the valve proper and seat. The exterior channel provides for additional cooling medium in much larger quantities and in more free circulation than is possible with channels, &c., inside the Valve-body.

Dust-traps have heretofore been connected with flues, &c., and are not original with me. In my device I project the nose-cap of a valve- 100 body outwardly horizontally and place a dustvalve at the outer projection of the nose-cap, thus causing the nose-cap to serve as a valvecap and as acondnit for bringing the dust-discharge out away from the fine, and at the same time I insure the cleaning of that portion of the valve where accumulated dust is likely to be fatal to the opening and closing of the valve.

I claim as my invention- 1.. In a chimney-blast i'or hot-blast stoves, a metallic valvebody connected to the shell of the stove and provided with an outwardlyprojceting male portion, and a masonry chimneyllue encircling and surrounding said male portion of the val vcbody, combined substantially as and for the purpose set forth.

2. In a chimney-valve for hot-blast stoves, a valvebody disposed in the chimney-flue, a chamber surrounding the valve-body exteriorly, an opening from the atmosphere to such chamber, and an opening leading from such. chamber to the chimneyflue, combined substant-ially as and for the purpose set forth.

3. In a chimneyyalve for hot-blast stoves, a valve-body connected to the stove, a chimneyflue connected to the stove and engaging the valve-body by a slip -j oint, a chamber surrounding the valve-body exteriorly, an opening leading from the atmosphere to said chamber, and an opening leading from the chamber to the chimney-flue, combined substantially as and for the purpose set forth.

4. In chimney-valves for hot-blast stoves, a chimney-flue, a valve arranged therein and disposed horizontally with the nose-cap of its body projecting outward, and a dust-valve arranged in the outer projection of the nose-cap, combined substantially as and for the purpose set forth.

5. In chimney-valves for hot-blast stoves, a valve-body, a valve-seat fitted therein, provided with a cooling-channel, a hollow valve, and a cooling-passage exterior to the valvebody, combined substantially as and for the purpose set forth.

VICTOR O. STROBEL.

Witnesses:

A. KATZ, A. A. BROOKMEYER. 

